Home » Titan Flowmeters » Flow Meter Calibration and Test
Unless otherwise stated or requested, all Titan Enterprises flowmeters—excluding beverage meters—are calibrated using our positive displacement oil or water flow rigs. These rigs have an overall uncertainty of ±0.25% (95% confidence level). Calibration is available for flow rates up to 200 L/min for water and 100 L/min for oil, depending on viscosity. To ensure accuracy, our flow rigs are annually verified against certified weigh scales traceable to national standards.
The calibrators operate using a piston within a precision-honed bore tube, creating a moving barrier between the pressurizing gas and the displaced test fluid. A linear encoder/translator attached to the piston generates a continuous stream of electrical pulses, each representing a highly precise, minuscule volume of fluid. This design ensures that volumetric flow measurements remain virtually unaffected by the viscosity and density of the test fluid. The calibrator system includes a precision-honed flow tube, a flow piston and shaft, a photoelectric sensor (encoder), associated valves, a supply tank, and an electronic console for data interpretation and display.
Pressurized air is introduced to the upstream side of the piston to generate the fluid power required for calibration. The system is fully flooded and bled downstream of the piston to ensure accurate operation. Flow rate is regulated through throttling valves, controlling the movement of the piston as it travels down the flow tube, precisely dispensing fluid through the flowmeter under test. As the piston moves, it advances the photoelectric sensor past the etched glass rule. Each time an etched line interrupts the sensor’s light beam, the encoder generates an electrical pulse. The frequency of this pulse train is proportional to the piston’s velocity and, consequently, to the fluid’s flow rate. The total pulse count directly corresponds to the volume of fluid displaced by the piston.
Titan Enterprises has been using piston provers for flow meter calibration since 1994. Our primary calibration rigs cover flow rates from 0.002–40 L/min and 0.05–200 L/min. With the latest software upgrade on our new flow rig, we can now calibrate flows as low as 0.05 ml/min. All Titan flow calibrations are traceable to national standards and feature real-time temperature compensation to account for changes in fluid properties. Our piston prover systems undergo annual calibration against certified weigh scales and are pneumatically or hydraulically driven to maintain a constant flow rate.
Titan has recently acquired a new calibration rig that enhances both production efficiency and calibration capability for flow rates below 4 L/min, extending our lower calibration range to 0.05 ml/min. Like our primary flow rigs, its volumetric throughput is traceable to national standards through a water draw test. The rig offers exceptional precision, with a repeatability of ±0.02% and an uncertainty level of 0.03%.
In 2018, Titan invested in a high-pressure test unit, allowing in-house pressure testing of our flow meters. With a maximum design pressure of 1200 bar, this enables rapid validation of new designs and certification for high-pressure applications.
Our OEM customers, especially in the oil and gas industry, often require specific liquid flow pressure ratings for accurate and chemically resistant measurement devices. Titan’s proprietary oval gear design ensures OG flow meters deliver reliable, high-performance results. For example, the High Pressure OG4 flow meter operates at temperatures up to 150°C, is fully IP65/NEMA 4 compliant, and includes individual calibration and pressure test certificates, verifying its capability to withstand pressures up to 700 bar—or 950 bar for custom models.
Titan’s instruments are calibrated against traceable standards, just like our flow meters. Our frequency, voltage, and current instruments are certified by a fully AKAS accredited laboratory with an uncertainty of ±0.33%. The pulse generators feature frequency locks to maintain the selected frequency throughout calibration. All instruments purchased with our flow meters are calibrated to customer specifications, thoroughly tested, and supplied with a calibration certificate.
Titan’s Ultrasonic and oval gear flow meters are calibrated as standard, with hard copy calibration test certificates provided unless an electronic version is requested. Turbine flow meters are typically supplied as calibrated units, though uncalibrated options are available upon request. Low-cost Beverage meters are uncalibrated, as they are usually calibrated by the user in situ.